The URL is for AS7 and WildFly which has a separate (and different) management approach.
For JBoss 5.1 you need to use JMX or you might access the jmx-console via IP:8080. Here you need to choose the correct connection-pool and you will see the statistic.
Another and more convenient UI is the admin-console which can be used from this URL as well.
Finally I did this requirement in applicatio level with JMX
Thanks for your support